5. As suburbs expand, they sometimes combine with the suburbs of the _________ metropolitan areas to form a megalopolis, a vast area in which many metropolises merge.
(A) adjacent
(B) large
(C) distant
(D) remote
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統計: A(338), B(17), C(10), D(27), E(0) #1801821
統計: A(338), B(17), C(10), D(27), E(0) #1801821